Description
SYN480R ASK OOK RF receiver IC SOP8
General Description
The SYN480R is a low-cost, high-performance ASK/OOK superheterodyne receiver IC designed for wireless data transmission in the 315 MHz, 433.92 MHz, 868 MHz, or 915 MHz ISM bands.
It is commonly used in wireless remote controls, keyless entry systems, and data links.
The chip integrates an RF amplifier, mixer, IF amplifier, and data slicer to provide stable and sensitive demodulation of ASK (Amplitude Shift Keying) or OOK (On-Off Keying) signals.
⚙️ Key Features
-
Supports ASK / OOK modulation schemes
-
Wide operating frequency range: 300 MHz to 450 MHz
-
High sensitivity: typically –112 dBm @ 2.4 kbps, 433 MHz
-
Low current consumption: ~3.5 mA (typical)
-
Fast startup and data acquisition
-
Digital data output (CMOS/TTL compatible)
-
Low external component count
-
Stable operation over wide supply and temperature range
-
Compact SOP-8 package
⚡ Electrical Characteristics
| Parameter |
Min |
Typ |
Max |
Unit |
| Supply Voltage (VCC) |
3.0 |
5.0 |
5.5 |
V |
| Operating Current |
— |
3.5 |
5.0 |
mA |
| Sensitivity |
— |
–112 |
— |
dBm |
| Operating Frequency Range |
300 |
— |
450 |
MHz |
| Data Rate |
0.1 |
— |
10 |
kbps |
| Output Voltage (DATA pin) |
0 |
— |
VCC |
V |
| Input Impedance (RF IN) |
— |
50 |
— |
Ω |
| Operating Temperature Range |
–40 |
— |
+85 |
°C |
📦 Pin Configuration (SOP-8)
| Pin |
Name |
Description |
| 1 |
DATA |
Demodulated digital data output (CMOS/TTL) |
| 2 |
GND |
Ground |
| 3 |
VCC |
Supply voltage (3.0–5.5 V) |
| 4 |
RF IN |
RF signal input (from antenna or matching network) |
| 5 |
GND_RF |
RF ground (connect close to antenna circuit) |
| 6 |
CAGC |
AGC (Automatic Gain Control) capacitor connection |
| 7 |
CIF |
IF filter capacitor connection |
| 8 |
VREG |
Internal regulated voltage output (bypass capacitor to GND) |
🧠 Typical Application Circuit
The SYN480R typically connects as follows:
-
Antenna → Matching Network → RF IN (Pin 4)
-
DATA (Pin 1) → Microcontroller RX input
-
VCC (Pin 3) → +5 V (with decoupling capacitor 0.1 µF + 10 µF)
-
GND (Pins 2 & 5) → Ground plane
-
CAGC (Pin 6) → External capacitor (~1 µF) to GND
-
CIF (Pin 7) → External capacitor (~1 nF) to GND
-
VREG (Pin 8) → Decouple with 100 nF to GND
📡 Typical Performance (433.92 MHz)
| Parameter |
Typical Value |
Condition |
| Sensitivity |
–112 dBm |
2.4 kbps, 433 MHz |
| RSSI Response Time |
1.0 ms |
— |
| Frequency Tolerance |
±100 kHz |
— |
| IF Frequency |
10.7 MHz |
Fixed |
| Image Rejection |
35 dB |
— |
| Adjacent Channel Rejection |
30 dB |
— |
🧱 Package Information
-
Package Type: SOP-8 (Surface-Mount)
-
Number of Pins: 8
-
Typical Dimensions: 4.9 × 3.9 × 1.5 mm
-
Manufacturer: Synoxo Microelectronics Co., Ltd.
-
Equivalent / Similar Devices: SYN470R, SYN480R, RXB6, MX-RM-5V receiver module core IC
🔧 Applications
-
433 MHz / 315 MHz ASK or OOK remote controls
-
Wireless alarm and security systems
-
Keyless entry systems
-
Home automation receivers
-
Wireless data links
-
Smart switches and sensors
⚠️ Design Tips
-
Use a short 17 cm wire antenna for 433.92 MHz (λ/4).
-
Keep RF traces short and add a ground plane for best performance.
-
Add bypass capacitors (100 nF + 10 µF) close to VCC pin for noise immunity.
-
Use external AGC and IF filter capacitors as per reference design for stable operation.
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